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O. R. SWAIN TELEPHONE SIGNAL.

No. 359,984. Patented Mar. 22, 1887.

Zlfifnesses; Inventor UNITED STATES PATENT CHARLES R. SYVAIN, OF' PEEKSKILL, NEW YORK, ASSIGNOR OF ONEHALF TO VILLIAM D. SOUTHARD, OF SAME PLACE.

TELEPHONE-SIGNAL.

SPECIFICATION forming part of Letters Patent No. 359,984, dated March 22, 1887.

Application filed March 19, 1884. Serial No.124,730. (Modehl To all whom it may concern.-

Be it known that 1, CHARLES R. SWAIN, a citizen of the United States, residing at Peekshill, in the county of \Vestchestcr and State of New York, have invented a new and useful Improvement in Telephone-Signals, of which the following is a specification.

My invention relates to signals and alarms in connection with telephone magneto call bells; and its object is, first, to give notice to persons who may have been absent from their rooms or places of business of the ringing of the telephone callbells during such absence; second, by means of an auxiliary bell, to give notice at a distant point of the ringing of the telephone calhbcll; and, third, to call any one of several subscribers who may be connected with a single line. I attain these objects by the mechanism illustrated in the accompany ing drawings, similar letters referring to similar parts throughout the several views.

Figure 1 is a front elevation of my device in its normal posit-ion. Fig. 2 is an elevation showing that the bells have been rung, and also disclosing the details of my device. Fig. 3 is a side view illustrating further details and my manner of ringing an auxiliary bell, and Fig. i is another form of my device.

My device consists of the common form of annunciator-drop applied to a magneto-bell case, as in Fig. 1, in which A A represent the bells as used on the ordinary telcphouecase.

B is the bell-hammer.

D is the drop or shutter, hinged at 1 to a frame that may be constructed in two ways, as at C- in Figs. 1 and 3, in which the frame 0 is screwed directly on the face of the bell'case, or as in Fig. 2, in which 0 is provided with projecting arms a b, by means of which the frame may be suspended from the screws that secure the bell-adj usters, as shown by the dot ted lines in Fig. 1. The provision of this method of hanging the drop is to anticipate any objections that might be made to driving screws into the bell-cases.

Pivoted to frame G at 2 is the bell-crank c c, notched atthc end of arm 0 to inclosc the bell-hammer lever. The end of arm a bears a catch, (Z, as shown in Fig. 3. Spring E is fastened at its lower end to pin 3, and its upper end hooks into the lever at 4 and tends to keep the lever against pin 5. The projecting edge of arm 0, into which the spring is hooked, serves also as a stop for the drop when it is pressed to its normal position. The form I give to d admits of the drop being readily pushed to its place within the notch. To save time and trouble to the operator this lever must always be in position to catch the drop as soon as it is thrown by the touch of a tinger to its place; hence the employment of spring E and pin or stop 5; but as the power that vibrates the bell-hammer is a light one spring E requires to be so adjusted as not to counterbalance that power, which is easily done.

The normal position, then, of the hell-hammer B, lever c c, and drop D is shown in Fig. 1. The first stroke of the hammer will be against A, carrying arm 0' to the right, lifting arm a, with its catch (1, releasing the drop, which falls. If the last electric impulse should leave the hammer against bell A, the force of the spring would restore it to the position shown in Fig. 1.

In case a business man cannot always be in his office, yet wishes to respond promptly to telephone-calls, as the coal-dealer, for instance, I propose placing an ordinary electrical callbell in the coal-yard, or a distant part of business or other premises, and connecting it in circuit with my annunciator and a local battery, as indicated in Fig. 3, in which one end of a line is connected with frame 0 and the other terminates in a spring, as at e. The dropping of the shutter D closes the circuit. Of course a single line may be used with the terminals grounded, or the circuit may be constituted in other known ways. When frame G is hung as in Fig. 2, spring 6 would be attached to the frame, with proper insulation. This arrangement is particularly advantageous in cases where prolonged ringing is necessary or desirab1e-in calling physicians-and by it arrangements can be made with central oflices, or with other subscribers, for early calling of mornings, and the ringing would only require a moment of time in turning the magneto-call by the caller.

Another form of constructing my annunciator is illustrated in Fig. 4, in which I use a straight lever instead of a bell-crank lever.

The action is the same; but owing to the slight 1 movement given to the short end of the levei" 2. In a combination of an annunciatondrop 1 with the bells of a magneto-call box, the arms a and b of frame 0, by means of which the screws that secure the bell-adjusters are made available for supporting the frame 0, substantially as shownand described, and for the pnr-- 2o pose set forth.

OH.i-.RLES R. SWAIN.

Witnesses:

CLARENCE H. Fnos'r, MURRAY S. GARDINER. 

